Charles III has revolutionized the centuries-old coronation ceremony of a British king. For the first time in history the British monarchy has opened up to the rest of the Royal House including in its guest list members of royalty from around the world.
And the attendance at a historic event has been massive. The British monarchy is the only one of the ten parliamentary monarchies in Europe that maintains the coronation. The rest choose other formulas, such as the proclamation of Felipe VI. That of Charles III has been a conclave of royalty, with the presence of all the reigning dynasties except that of Cambodia.